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Saint BlueFrag, Who Arrived in Pieces
Patron of Bluetooth left switched on, fragmented packets, and phones that no longer get updates.
Life
On 6 February 2020 Jan Ruge of ERNW described CVE-2020-0022, a miscalculation in the Android code that reassembles fragmented Bluetooth packets. On Android 8 and 9, knowing the phone's Bluetooth address was enough, with Bluetooth switched on, to run code without any interaction; on Android 10 the flaw merely crashed the Bluetooth service. Google fixed it in the February 2020 bulletin.
Prayer
O Saint BlueFrag, who arrives in pieces and reassembles where he shouldn't, remind us to turn Bluetooth off when we don't need it. Amen.
How to celebrate
Celebrated by installing the February 2020 Android security patch or, for phones their maker abandoned, keeping them undiscoverable.
Small fragment, whole damage.